From inside the book

Harris' book gives a complete description of precision mechanical (movingcoil) test instruments manufactured in the early to mid-1900s. They were often mounted in glued wood enclosures to avoid magnetic influences. brittle Bakelite plastic and even black painted glass were available for the dial but more shock resistant plastics had not yet become available for the case.The meters were used by the National Bureau of Standards (NBS) to establish electrical values used in the sale and billing of electrical power generated by hydroelectric dams and coal fired generation plants.Today, these meters are collected by individuals and museums. who would appreciate the comprehensive treatment given in this book. It will be of great interest for anyone collecting, displaying, or restoring moving coil meters (or panel mounted devices such as thermocouple controlled temperature regulators). This will include museum curators, individual collectors, and those interested in the limitations of mechanical